(D) The changing diets of early humans
48. The word "controlled" in line 19 is closest in meaning to
(A) abundant
(B) managed
(C) required
(D) advanced
49. The relationship between botany and agriculture is similar to the relationship between zoology (the study of animals) and
(A) deer hunting
(B) bird watching
(C) sheep raising
(D) horseback riding
50. Where in the passage does the author describe the benefits people derive from plants?
(A) Line 1
(B) Lines 6-8
(C) Lines 10-11
(D) Lines 13-15